I also went to a rural high school. I, along with every other male student in the entire school, was 6'7, and benched 405 (on a bad day). It's the norm.
Just for reference, (you know to check the depth of the BS) NFL OL- Avg. Height: 76.75 in Avg. Weight: 314.16 lbs. Also a 410 lb bench for a high school player that hasn't had nutrition and professional S&C is very impressive if it truly was an unassisted bench; some of the strongest players in the combine bench anywhere between 470-500 and they're usually built like tanks.