Need help on configuring subdomain pointing to a server's IP address

I have a subdomain (lms.rguktn.ac.in) on godaddy's servers shared hosting. I wwant the subdomain to point to the server 117.254.89.189/moodle

I have configured it but the subdomain is redirecting to IP address. what I want is the site to be accessed as lms.rguktn.ac.in

#
# The default server
#

server {
listen       80 default_server;
#listen       [::]:80 default_server;
server_name  _;
root         /var/www/html;

# Load configuration files for the default server block.
include /etc/nginx/default.d/*.conf;

location / {
        index index.html index.php index.htm;
}

error_page 404 /404.html;
    location = /40x.html {
}

error_page 500 502 503 504 /50x.html;
    location = /50x.html {
}

location /phpmyadmin {
    alias /usr/share/phpMyAdmin/;
    client_max_body_size 200M;
}
}

server {
listen 80;
listen [::]:80;

root /var/www/html/moodle;
index index.html index.htm index.php;

server_name lms.rguktn.ac.in;

location / {
    try_files $uri $uri/ /index.php?q=$uri&$args;        
}

location ~ \.php$ {
    include fastcgi_params;
    fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
    fastcgi_pass 127.0.0.1:9000;
    try_files $uri @uri/ =404;

}
}