I'm 172cm tall, (that's about 5'8 I think?) and I weigh around 70kg (which is around 154lbs). Check out my link for a photo:
Most Helpful Girl
You don't look overweight in your photo and your body mass index (BMI) is ~23 which is fairly average so you're not overweight in that regards. Waist circumference is a better indicator for health risk than BMI, if it is over 80cm then medically you would be considered considered overweight and be at increased risk of weight-related health problems.
In any case, it sounds like you do indeed have a healthy weight for your height and age. Remember, weight is also determined by ethnicity, genetics, diet/lifestyle/activity, medical conditions and some medications, so things like BMI are only ever a guide. You look fine and if you feel healthy, aren't eating too much junk and doing some physical activity then you don't really have anything to worry about.0