How to extract many coordinates in geometry?

Hi, I'm trying to extract the coordinates of several points and more importantly, I need to assign their coordinates as a variable.

Let's simplify it.
There is a random function (has a value between 0 and 1) and i'd like to find where(value>=0.9) and their coordinates and finally want to assign as variable.

1. coordinates of several points.
2. set up a new variable with their coordinates.

How could it be possible? I've been working for a month.
any suggestion would be thankful and whether it need to use livelink or not doesn't matter

Best regards.