If you already have progress toward the Making a Living achievement, there&;s nothing you need to do! The sales from your old shop will automatically be added to the sales from your highest-earning shop to continue progressing toward the achievement. If you do happen to make more sales in your old shop before they&;re disabled, though (or your achievement progress is out of date!), you can update your progress by visiting the shop&;s edit page, the same place the Making a Living achievement was previously earned.