How Important is Quality of High School in Acceptance to Elite Universities?

As someone that is pretty new to all of this, can some of you help me understand how rare this profile is? I know 760 is max on math and college board lists it as 99+ percentile for 11th graders. For a 9th grader is this 99.9% or 99.99% or something less impressive. I would imagine that he is projected for something like a 1550-1600 SAT with 800 on math. Does that seem right? Maybe 800 EBRW is a reach from this score? Thanks so much.

For context, he only found out his school was offering the PSAT for ninth graders the night prior so there was no prep work involved. Please do not see this as an attempt to brag. I’m just looking to get a handle on whether this is truly exceptional or more of a “nice job, but we’ve seen this before”. Thanks.

CO_Dad