I assume this is 70 fields in one row of the DB.
you will have to write one really long formual to add them all together ans that will be your fianl value which you can easily use in the select expert to find >5
//row_total
Table.field1 + Table.field2 + table.field3 + table.field4 .... + table.field70
Note that if any of these values could be NULL you will need to make sure that the formual is using defualt values for Null, otherwise the formula will return nothing on any row with any null.