when performing abdominal thrusts, what is the correct placement of your fist on the patient’s abdomen?

Place your fist just above the patient’s navel (belly button), with the thumb side of your fist against the abdomen, in the midline.

Correct Hand Placement (Quick Scoop)

For standard abdominal thrusts (Heimlich maneuver) on a conscious adult or child:

• Stand (or kneel, for a child) behind the person and wrap your arms around their waist.

• Make a fist with one hand and place the thumb side of your fist against the abdomen.

• Position that fist just above the navel but below the lower end of the breastbone , in the center line of the abdomen.

• Grasp your fist with your other hand and deliver quick, inward and upward thrusts.

This placement targets the area over the diaphragm so the thrusts can forcefully expel air from the lungs and help dislodge the obstruction.

Always seek proper first-aid/CPR training and activate emergency medical services in a real choking emergency.

TL;DR:
When performing abdominal thrusts, put your fist thumb-side in, on the midline of the abdomen, slightly above the navel and below the breastbone , then grasp it with your other hand and thrust inward and upward.

Information gathered from public forums or data available on the internet and portrayed here.