Female: (height cm-70) × 60% = standard weight.

Standard weight plus or minus 10% is normal weight.

Standard weight plus or minus 10% ~ 20% overweight or underweight.

More than 20% of the standard weight is obese or underweight.

Height 170, standard 60KG, about 120. You are only 92, of course, a little light, and your height and weight should be proportional.