Accuracy only 78%

please help me in getting better accuracy.
https://drive.google.com/file/d/1StqfB1Jue1kYnX6e3b9c74mfBhJQZt4n/view?usp=sharing

78% is a good accuracy with knn in this dataset. If you want higher accuracy you can use other algorithms like SVMs and Random Forests.
I hope this resolves your doubt.

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