Sometimes print alignments require a settings change
Just before you click the final "Print" button there will be options, including "Destination", "Pages", and "Copies".
Click "More Settings" and more options will appear.
Ensure your "Paper size" is set to either "A4" or "A4 (210 x 297mm)
Ensure your "Scale" is set to "Default" or "100" and *not* "Fit To Page"