Click once on the plot, either in the plot window or in the Object Manager, so that the plot is selected. Click the Graphs | Digitize | Digitize command or the Graphs | Digitize | Digitize Fixed command.
Now moving the mouse around on the plot, the X,Y location of the cursor is displayed in the status bar. When the Digitize Fixed command is selected, the cursor is fixed along the plot, only showing XY values that are on the plot. When the Digitize command is selected, the cursor can be moved anywhere. The XY values are for the axes associated with the selected plot.
While in digitize mode, click on the screen to display the X,Y value of the clicked location in a report window. Continue clicking to add additional X,Y values to the report window. The list of values can be saved by clicking the File | Save command in the report window.
To exit digitizing mode, click another command or by press the ESC key on the keyboard.
There is a second way to show the XY values of individual points on the graph. Click the File | Options command. On the left side of the dialog, click Plots. On the right side, check the box next to the Display value on click option. If the point should also be highlighted in the worksheet, check the box next to the Highlight worksheet option. Click OK. Now click on a point on the plot. The XY values of the point under the mouse click will be displayed in the status bar (and optionally highlighted in the worksheet).
Updated July 7, 2016