Is there any particular reason that you need higher grades, for example to secure your place at college? Unless there is, I would leave it, as there's nothing to be gained, and as big a thing as it might feel today, nobody will care soon (not even you) whether you got a 6 or 7 in whatever. Honestly. There's no point in asking for a remark when there's no actual benefit, or everyone who was a mark or two off would do it.