How many decimal places did we end up moving?
We started at the end of the number 123400 and moved it between the
1 and 2. That looks like a move of 5 places.

What direction did it move?
Looks like we moved it to the left.

Note how the number we started with is a bigger number than the
one we are multiplying by in the scientific notation. When that is
the case, we will end up with a positive exponent.