speaker placement

On the short wall the ceiling to the right will be about 5ft higher in rm, what is best to treat this with, will have good open space for this channel( Right side). About 5ft fr back 4 ft side wall...
Hi 111,........
Just like my greetings your description of the problem is not clear and incomplete. As much as I would like to help, I can't do it based on information you provided.

Here are some pointers that can make it easier for the rest of us to get the whole picture.

1. What problems do you have with your set-up
...............( Placement or acoustics ).................
2. To make any meaningful advice or suggestion we will need:
a) room's dimensions
b) speaker's in room placement
( how far from side&front walls).
c) Listening position.
d) what are your goals and how determine are you to make adj. if necessary.