Follow below steps to show filtered vs total sales.
1. Create a slicer and add country.
2. Create a bar chart with country and sales.
3. Create measure Total Sales = CALCULATE(SUM(Orders[Sales]),ALL(Orders[Country]))
4. Create measure Filtered Sales = Ceiling(SUM(Orders[Sales]))
4. Now create 2 cards one for total sales and another for filtered sales.
5. Now add the country in the filter. You can observe the filtered vs total sales.
Hope this helps you.