Exporting data from a plot

I have the following problem.
I’m generating data plot and then I want to shift some points. I use TGraph so it is easy to shift the point with mouse, but then I want to export the new value of the point. I mean “x” value and “y” value. Is it possible to read new “x” value and “y” value of points from a plot and export it as a data file??

Save your pad/canvas as a .C file