Does look like a broken spine. Nothing you can do, many jardinis kill themselves by ramming into the glass and severing their spine. A fish can survive with a broken spine, I have seen carp with broken spines and they are a good 30 pounds so they are living well with plump bellies. Hes trying to correct his spine currently. You can try and correct it for him by using force, but that is very risky as it might be the death of him.
I personally would leave it and see how he is swimming/living for a couple weeks. If its bad and hes suffering I honestly would kill him fast and painlessly. I too have a jardini that was raised from mere inches and would be crushed if that has happened to me. But the fish I have seen with broken spines are perfectly fine but their spine is just curved so just observe for a couple weeks and see what your really dealing with. Good luck and please update.