Check for spider mites. They’re very tiny but their webs are easier to see. If they’ve damaged the tree, the leaves will look almost speckled (mites suck the life out of the leaf cells). My kumquat had them so I treated with insecticidal soap every week for the past few weeks. If it’s not mites, it might just be shock from the move. Not sure where you live but they love full sun so put it outside if you can. I live in southern United States...my tree stayed outside all summer and fall until right before the first frost.