thx jorrarro for your reply.
I tried to import coordinate (in txt format) to ArcMap using the following tutorial, but I only get "Field 6", for X and Y directions. I can choose again Field 6 for Z direction, but I think the way I'm doing is wrong. Could you please elaborate more on how you imported and got the points on the map?
https://www.youtube.com/watch?v=cT1eFTu1unk
Thanks in advance