How to plot x,y stetch coordinates to excel?

No direct way.  If you know how to write macros you can write a macro...

If you have a whole bunch in one sketch, you can use the sketch as the driver for a sketch driven pattern and create holes in a dummy part.  You can then put the part in a drawing and create a hole table which can be exported.

James,

I have a macro that would save the co-ordinates as custom properties and another one that can save co-ordinates to a text file.

James,

Youre in luck. I found a macro in the forum that can save the co-ordinate points to excel.