How much that should weigh at 5 foot 6 inches depends on if you are a man or a women. On average a women can weigh between 130 - 155 pounds at that height. You can find more information here: howmuchshouldiweigh.org
A good way to assess your weight is to calculate your body mass index (BMI). BMI takes into account not just your weight, but also your height to indicate body fat. The goal for most people: a BMI that's over 18 and under 25.