Can you clarify what you are after here? I'm not sure what you mean by it does't adjust high enough.
My Accord will sometimes snap out of it's track if I am washing it and knock it to the side. I just have to run it all the way to one side and tap it back into place. Very similar to what Ferdball mentioned. Put it all the way down and tap the top just a little to put it on track. Now try to tilt you mirror again.
Depending on what you mean......are you sure you have adjusted the seat correctly. The seat does have a height adjustment and moves up and down several inches. The may help to cure your mirror issue. The height adjustment is a bit tricky, you have to push right in the middle of the horizontal adjuster, otherwise you just get the tilt movements.