Speedometer off

so I know my Speedo if off a bit.

Downloaded a gps speedo app for my phone.
When the app is reading 60mph
My speedometer is reading 67.

So my question is, do I need to go up a tooth or down a tooth on the speedometer gear?
I need to pull the current one out this weekend to see what it is. Changed it out a couple years ago but apparently didn’t get it right.

Mine is exactly 5 slow and below is the list of things I have done about it.:D
1. Nothing, I know what it means when it says 70.