Have you looked at the standards for centering on PSA's website? A PSA can be up to 65/35 on the front *basically one border can be twice as wide as the other side* and 90/10 on the back *9 times the border on one side than the other*.
https://www.psacard.com/resources/gradingstandards/
That being said, they are normally pretty lenient on rough cuts since that's the natural cut for the issue and means that the card hasn't been trimmed. I one day hope to get the same call of highly underestimating the value of my cards at PSA.