My Grandpa is 77 years old and he is showing symptoms such as shuffling gait, low volume speech, frequent falls, ataxia, as well as slow but progressive cognitive function, most likely dementia. he remembers who his family is when we visit him, but has trouble concentrating and tries to leave conversations without any major explaination until my father asks him what he wants. It usually takes about 4 times asking "where are you going" until he tells us. My grandpa is in a wheelchair now. are these signs and symptoms of a likely diagnosis of Lewy Body Dementia?

It runs in my family, and i lost my grandpa and great aunt to it. i just want to be aware of it to be safe. and what is the chance that i'll get it?