By default, the Footer style has a center tab and a right tab set.
You could simply press the Tab key twice after the first part.


You could also use an Alignment Tab set to your right margin.


Resources:

• 4. Use Tables and Tabs to Arrange Text in Microsoft Word
• Setting Tabs by Suzanne Barnhill, MVP
• Header/Footer Settings Recap
• Working with Tabs
• Left and Right Justification at the same time