Top hinge

Looking at your photos, I believe that the problem is in the bottom pivot. You have a large gap at the top header of the door. There are two adjustments in the bottom pivot to raise it up. First, remove the cap on the bottom pivot attached to the door. With that cap removed, you can access the hex allan adjustment screw. Turning it clockwise, it should raise up the door. If that fails, then you will need to use am open end wrench and turn the threshold pivot to raise the door. Use plenty of spray lubricant like WD-40. If you do need to replace the pivot set, our 79-123 does have a top spring loaded pivot pin. This may be a good match.