Photoshop action script

Hello,

Can someone give me an action script which could position my layer on specific Y location depending on height of text. I have a hundreds of PSD files with text. Each text has a different height. I need a script which would put the text of every PSD file so that Y position is always 8.5 cm but that Y position should be across the middle of text. My canvas is always the same size.

Thank You very much!!