To view the store report, go to Event Dashboard>>Store>>Store Orders. This lists all of the store orders for the event. Like with other reports, you can search and filter the report with the Search dropdown menu at the top of the page. You can export it as a CSV file using the blue link at the bottom of the page. 

If you click on the blue order number, you can view all the information about the order and add notes:

To view Purchased Store Items in the Ticket Purchases Report, go to the Event Dashboard >> Reports >> Ticket Purchases.  Select Include Purchased Store Items and select Search Purchases.

You can view the information about the Store Items purchased in this report.