LOLOL ... guys! Square door and curved driveway ... basic geometry, right? Best repair is to take off from the right corner of the garage and re-pour to appropriate slope and height.
I would ask the owner for a give-back deduction on the price for this "essential" repair. Can't have raccoons slipping into the garage for the night, right? Should not be a deal breaker and your problem will be quickly solved, Mr. Gatewood!