If you create a field like this
([OrderTotal] = 1 AND [SubscriptionType] = ''month'')
[OrderTotal] > 5
and then bring this field onto the Filter Shelf and set to true, the number of records should now reflect this condition. If you want the >5 to be dynamic, you could also parameterise this value.
Hope that heps
You can use the concept of sets in tableau and apply as filter.
alternatively Check this:
Glad it helped
Sets, as Kumar suggested, is also another way to go.