Control LED ON/OFF by HMC5883L

I want to control LED on/off by HMC5883L
If X angle between 70 and 80 LED on, else LED off.

But my test results is LED all on when X angle equal to any value.
Please help.

Thank you

My code is as follows:

#include <Wire.h>
#include <HMC5883L.h>
HMC5883L compass;
void setup()
{
Serial.begin(9600);
Wire.begin();
compass = HMC5883L();
compass.SetScale(1.3);
compass.SetMeasurementMode(Measurement_Continuous);
pinMode(8, OUTPUT);
}
void loop()
{
MagnetometerRaw raw = compass.ReadRawAxis();
MagnetometerScaled scaled = compass.ReadScaledAxis();
float xHeading = atan2(scaled.YAxis, scaled.XAxis);

if(xHeading < 0) xHeading += 2*PI;

int xDegrees = xHeading * 180/M_PI;

Serial.print(xDegrees);
Serial.print(",");
if(70< xDegrees <80){
digitalWrite(8, HIGH);
}
else{
digitalWrite(8, LOW);
}

delay(100);
}

 if((xDegrees > 70) &&  (xDegrees < 80)){

Code tags, please.

thank U!!!