I'm 21 yr old, my height is 5.4ft n my weight is 76kg. I feel to reduce my weight and increase my height , is it possible/..

Did you input that right? 76 what?

Please give us your correct weight --- we are not here to judge

Height and Weight Chart - height weight chart, weight height chart

A woman 5'4" (medium frame) should weigh 124 - 138 LBS

Perhaps you meant kilograms which would make you ~167 lbs which means you would be considered to have a BMI on the high side for your body. Also if you lose weight it would be possible to look taller but if you are out of your teens it is unlikely that you will grow any more

Weight watchers!
That is the best way in the world to loose weight
My grandmother lost over 60 lbs
My mother 30
And I have lost some myself.
I have to say it's the best thing you can eat basically anything... you just have to stay healthy.drink a lot of water.fruits and veggies.I highly recommend weight watchers.