How to Specify Out Unit to Be in Decimal Degree in ArcGIS JS API

I am using a Map service on ArcGIS Server 10.4.1 which is in this format

Spatial Reference: 102100  (3857) 
Single Fused Map Cache: false 
Initial Extent:
XMin: -9819759.37726215
YMin: 5128008.078704429
XMax: -9809084.764440382
YMax: 5132626.115644935
Spatial Reference: 102100  (3857)
Full Extent:
XMin: -9819004.6505
YMin: 5125535.589900002
XMax: -9809349.0802
YMax: 5131992.668099999
Spatial Reference: 102100  (3857)

Units: esriMeters

Now when I query the service it returns the data in Meter format which I can not display back them on the map as new graphics. Can you please let me know how I can change the service configuration or OutUnit in ArcGIS JavaScript API to be in Decimal Degree?