Point selection help

I imagine this is a simple question for many…

I’m trying to select only the points to the left of a certain X quantity (the points on the left side of the circles shown in the screenshot)

Any suggestions for how best to do this?
Mexico City V.2.gh (13.5 KB)

Thank you!

I also need help with this, help is highly appreciated,

Thanks in advance,

You didnt internalise your data, but here is an example using Sort List.
SortPoints.gh (7.8 KB)

Thank you Adam!