To solve the expression \(6 - (-84)\), we first need to recognize that subtracting a negative number is equivalent to adding that positive number.
So, the expression becomes:
\[ 6 + 84 \]
Now, we can add these two numbers:
\[ 6 + 84 = 90 \]
Since 90 is greater than 0, the result \(6 - (-84)\) is positive.