Two methods.
BTW when I say 'M' for move the default dialog box is set to 'bodies, sketches,' yet if you are moving -only- sketches you'll need to change that default in the move dialog box.
-- Visually....
Select the entire 'S.'
Hit 'M' for move.
In the dialog box click Set Pivot and it should change to a check mark.
Move the cursor near that point you want to align and the Pivot should snap to it. Click the mouse, and in the dialog box click Set Pivot again the fix the pivot there.
Use the handles in the manipulator to move the entire selection towards the target.
As you get closer zoom in further and further, and move the selction closer.
At the closest zoom set the point you're moving over the target, and in the dialog box click OK.
--- By the numbers...
Use Inspect - Measure.
Select a point, and not the x/y/z coordinates. do that for both points.
Simple math will tell you how far the point has to move in whatever dimensions to make them the same location.
Hit 'M' for move.
Select the entire 'S' sketch.
Click one of the handles in the manipulator for the direction you want the selection to move, and move the mouse slightly. In the Move dialog box you will see numbers change for the direction you moved the mouse. Click on that number, and type in exactly how far you want the selection to move.
Do that for both dimensions you want to move.
In the Move dialog box click OK.
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