How can we find out where it is? How can you do that based on a screenshot?
In your screenshot, I see that a text Industry Index appears on the row you marked. Can we use that label as a reference for the vertical location of the region to move the mouse to?
There is a good guide on Sanderling by Terpla: Terpla adventures or blog-style guide for begginers
If you have a question which is not covered there, I can look up the right guide for your question.
Another good starting point is this guide: How to Automate Anything in EVE Online