In the formula in your first post you used:

=SUM(IF(FREQUENCY(IF(ISNUMBER(SEARCH("X",$A1:$G1)) ,COLUMN($A1:$G1)-COLUMN($A1)+1),IFERROR(SEARCH("X",$A1:$G1),COLUMN( $A1:$G1)-COLUMN($A1)+1))>=5,1)) and in the formula in the most recent file:

SUM(IF(FREQUENCY(IF(ISNUMBER(SEARCH("X",$A1:$G1)), COLUMN($A1:$G1)-COLUMN($A1)+1),IF(ISERROR(SEARCH("X",$A1:$G1)),COLUMN($A1:$G1)-COLUMN($A1)+1))>=5,1))

Another possibility is the somewhat shorter formula:

=--(MAX(FREQUENCY(IF(ISNUMBER(SEARCH("X",$A1:$G1)),CO LUMN($A1:$G1)),IF(NOT(ISNUMBER(SEARCH("X",$A1:$G1) )),COLUMN($A1:$G1))))>=5)