My Husband Will Soon Be 69 Years Old. He Stays

My husband will soon be 69 years old. He stays freezing cold all the time. Yesterday it was in the mid 70's. He had to put on a quilted jacket to wear in the house. We live in Metro-Atlanta. He has stopped doing things that he has done for fifty years. He wants to sleep all time. We have had blood work and everything is norma There are other things but this is an example.