Top N selection based on filter

hi, Anonymous 

First, you should know that calculated column and calculate table can't be affected by any slicer. you could create a measure instead of column.
Notice:
1. Calculation column/table not support dynamic changed based on filter or slicer.
2. Measure can be affected by filter/slicer, so you can use it to get dynamic summary result.
here is reference:
https://community.powerbi.com/t5/Desktop/Different-between-calculated-column-and-measure-Using-SUM/t...
https://www.sqlbi.com/articles/calculated-columns-and-measures-in-dax/

Second, based on your measure, you could add a what if parameter as a slicer.

Then add a measure

TopN = IF([Rank]<=[Parameter Value],[Rank])

 

Here is a simple sample pbix file,  please try it.

By the way, your measure 

Rank = RANKX(ALL(carrier_attributes),SUM(carrier_attributes[Call Limit]),,DESC)

 is wrong, if this rank measure could meet you.

Rank = RANKX(ALLSELECTED(carrier_attributes),CALCULATE(SUM(carrier_attributes[Call Limit])),,DESC)

Best Regards,
Lin