The Balance field is a text field and contains the value "S6.96", which is a string. The IF statement is comparing a string with a numeric value (6.00). Since the operands are not of the same data type, this can yield unintended results. To correctly compare the balance, the string should be converted to a numeric value.

Example:

%%[ SET @Balance = "6.96" /* Simulating text field value */ IF (Value(@Balance) > 6.00) THEN SET @Result = 'Balance is more than $6.00' ENDIF ]%%

Salesforce AMPscript Data Types and Conversion