According to NWEA's comparative data placement guide, his 247 would be a recommended placement for Geometry (though just barely.) His score in 5th grade would put him at the top of the high achieving group for 6th grade.

https://docs.google.com/viewer?url=http%3A%2F%2Fwww.nwea.org%2Fsites%2Fwww.nwea.org%2Ffiles%2Fresources%2FComparative%2520Data.pdf