To update your business location, log in to your Business Dashboard, lick on Maintain Profile then click on update profile.
This lets you change basic information like your business name and business address location. Click on edit next to the business address and update your business location, changing the address here automatically updates the business location map displayed in your business page.
Click on the Update to complete the process.
If the default location on maps after change of address wrong, you can also drag and drop the pin to the correct location as well.