Does my mom have Narcissistic Personality Disorder?

My mom is 78 yrs old and ever since I can remember I've never done anything write. I'm 26 years old now. For example I woke up this morning with a smile to say good morning to my mother and the first thing that comes out of her mouth is "Where is the door knob protector in your bathroom the hole is getting bigger?" It wasn't a nice question, it was very cold. The "hole" is an indentation of the little lock that has been there since I've been a teenager, after I explain to her the stickyness came off so I threw it away she goes to telling me I don't respect my fathers house because I left a plate on the counter in the kitchen. This is just a tip of the ice burg. EVERYTHING needs to be done my mothers way or its not done the right way and she needs to show you the right way of doing things and when you explain okay well that's not the way I do it I have my own way You get scolded. SHE DOES NOT ACT LIKE THIS WITH OTHER PEOPLE. For the whole 30 yrs she was with my father (whom passed away a little over a yr ago) she bitched and complained about everything to him. When she's mad she slams doors, cabinets etc. She has a tendency to make you feel bad because your not doing things her way, or the right way. She gets angry VERY fast. She yells ALL the time. I pay rent in the house my Dad left me and I still get yelled at for the way I keep my room or bathroom. I find myself always trying to please her and its a never ending battle because you can't please her. She has a new bf of 3-4 months and is sweet as pie to him. When I asked why she's not like that with him her response" I don't live with him". WTF?! I remember when I was 7, (i have this on tape too) She was cutting cake and I asked her is this piece of great grandma and I had to ask again since I had gotten no answer and she yelled at me "WHAT DO YOU THINK?!". I watched this video the other day and the look on my face was heart breaking......ALSO if she does something wrong she'll say she didn't do it when I know darn well she did because no one else could have if I didnt!!! Of course I'll get yelled at for calling her out on it. I don't know wtf to do anymore. I left home because of her negativity and her anger and I ran fast. But due to circumstances I'm back and I don't feel comfrotable in my own home THAT I OWN. Of course this was Moms house while Dad was here and it still is moms house but I think she should let up on me a little bit. I'm 26, not 13.....I don't know how to handle this and of course If I mention anything about this possible disorder it'll just start a fight that i dont want to battle. HHHEEELLLLPPP!!!!!!!