The top filter is used to filter all items from the field domain with top N values that follow the order on aggregation(max, sum, min, avg) of fields.
Follow the below steps:
1. Drag and drop the products in the filter shelf.
2. Now go to Top pane in the edit filter dialog box and select Profit and enter N value as 5.
3. Drop product in row shelf and sales in the text field.
4. Now right click on product and cick on sort.
5. Click on x and close the sort dialog box.
Hope it helps you.