There are graves at the back and right of the house. Is feng shui good after all? How to change it?

Your question is only analyzed by words, and it is difficult to get a correct answer. For example, how high the mountains on the left and right sides are, how far away they live, whether they will turn into sand, how far the small river ditch behind the house is (whether there is often water), whether they will become "cold snakes around their necks" and so on. Better have an image to see. It's better to invite people who know Feng Shui to have a look and spend a little money to achieve something great.