He looks relatively normal. The only thing I see and it might just be the picture, is a bit of whitish on his underside. I would just keep an eye on him. He's probably stressed from being moved to the lfs
and then to your tank.
A good rule to try and follow is to try to never get fish from an lfs
immediately after they get them, always a good idea to wait a few days. That way if they are ill you will have a chance of knowing before they get to your tank. Better option, get a small tank for QT before introducing fish to your main tank. Qt'ing fish for 2 weeks will ensure your other fish's safety.