Thank you All for the encouraging post. So what I was told is that this was a mock PRT, so it wont go on his official record.
It was indeed an official marking office PRT (assuming he didn't run a mock company level prt on the same day as the marking office prt). It will not remove the failure from his record, but it does reinstate privileges lost due to a failure (overnights, weekday liberty, etc. based on class).
Best of luck to your DS. I am happy for the both of you that he passed. Fortunately every company has a physical mission staff. He should get to know his well and ask for guidance in staying for staying fit.