I would say that under stress he did well, the perp was carried away not him. But if it had been me, I have CC for 12 years the perp would have been pronounced dead at scene. practice practice practice.
Anytime you’re confronted by armed man and walk away is a great day. All the rest is nit picking. Putting the perp down should have been his primary objective and he did.
A lot of folks think simply having a gun means you’ll be prepared to use it. Shooting people while under stress is not the easiest thing in the world to do. Pistol accuracy—even as close as 8 or 10 feet—can only be achieved with lots of range time. I suspect the clerk was not an accomplished shooter. But he did manage to get the safety off and prevail. Kudos to him.